I have been taking my daughter fishing for the better part of her 13 years. Some of my best memories are of fishing with her.
A couple of things to remember though when fishing with kids; kids have short attention spans. I didn't go stalking tarpon, permit or redfish when she was young. Instead, I concentrated on bream, sunfish. catfish, and when we were in the salt I would hit the bridges and docks for snapper. If thefish aren't bitting, look around for insects and small critters in the grass and/or tadpoles, frogs and minnows at the waters edge. You can't believe how much fun a kid can have searching, finding, and watching these things. And remember, it's a time for them. When I wanted to have a quiet rexaxing time, possible enjoy a cigar, it was not when I took my daughter with me. There are plenty of other times for that.
Kudos for taking kids fishing! They will remember the fun long after we forget the headaches!
Surprise!
Flycasting practice
Relaxing